Suppose I have a vector of maps (this could also be a vector of records) (def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a has a value of 50, so that the final col of maps looks like [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}]. I came up with a function that does this: (defn find-assoc-in [k v mv] (let [f #(if (= ((first k) %) (first v)) (assoc % (second k) (second v)) %)] (map f mv))) (find-assoc-in [:a :c] [50 3] aa) The problem with this function is that it potentially does a lot of unnecessary copying of elements that aren't changed, and thus has a lot of garbage collection. I would like help coming up with something that does much less garbage collection. Will someone please point out a better way of doing this? -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.